Concentric Impulse: Force output at takeoff of jump.
Concentric Impulse - 100ms: Force applied in the first 100ms of jump motion.
Concentric Mean Power / Body Weight: Mean force applied during the takeoff phase.
Eccentric Mean Power / Body Weight: Mean force applied during loading phase.
RSI - Modified: Ratio of flight time and time in contact with the ground or how high and how fast.
Vertical Velocity @ Take off: How fast an individual leaves the ground
I believe this is a good combination of metrics not just for the sport presented but for all sports.
There is a good combination of strength, power, speed, and endurance to get a complete picture of an individuals overall athleticism and readiness to perform.
With my background knowledge of the sport in question as well as various fitness metrics, no additional measurements come to mind to add to the list provided.
As mentioned before, I believe this is a good combination, or at the least a very good starting point for being able to gauge an individuals athleticism.